634671 has 12 divisors (see below), whose sum is σ = 927472. Its totient is φ = 418176.

The previous prime is 634651. The next prime is 634679. The reversal of 634671 is 176436.

It is not a de Polignac number, because 634671 - 2⁹ = 634159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 510 + ... + 1236.

2⁶³⁴⁶⁷¹ is an apocalyptic number.

634671 is a deficient number, since it is larger than the sum of its proper divisors (292801).

634671 is a wasteful number, since it uses less digits than its factorization.

634671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 827 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 634671 is about 796.6624128199. The cubic root of 634671 is about 85.9375335096.

The spelling of 634671 in words is "six hundred thirty-four thousand, six hundred seventy-one".